Maxon Nine Series ST-9 Pro+ Super Tube Pro+ Guitar Distortion Effects Pedal<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Updated Reissue of 1980's Super Tube Screamer </span></li><li><span class="a-list-item"> Circuit Based on classic OD-9/OD808 </span></li><li><span class="a-list-item"> Dedicated Midrange knob to dial in amount of mid boost </span></li><li><span class="a-list-item"> Low Boost Switch adds low end punch - great for single coils </span></li><li><span class="a-list-item"> 9-volt or 18-volt regulated operation (switchable) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/517jg8Z270L.jpg" noproxy>